Device for drying and sterilizing air.



R. P. VAN GALGAILJ. ELLERMANN & H. J. MARTIJN. DEVICE FOR DRYING AND STERILIZING AIR. APPLICATION FILED DEC. 29, 1911.

1,067,693, Patented Jm 15,1913.

2 SHBETS-BHEET 1.

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Wxtnesses; Q Inventors. Z l

R. P. VAN GALOAR, J. ELLERMANN & H. J. MARTIJN.

DEVICE FOR DRYING AND STERILIZING AIR. APPLICATION FILED 111:0. 29, 1911.

1,067,693: Patented July 15, 1913 2 SHEETS-SHEET 2.

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anrnnnarinrnns vsa CALGAR, or os'es'reunsr, Am) J-AN'ELLER YANN nun HENDEIKUS JOHANNEs-MARTIJN, or THEHAGUE, NETHERLANDS.

DEVICE FOR DRYING AND STERILIZINGAIR.

specification of Letters Patent. Patentetl July 15,1913.

Application filed December 29; 1911. Serial No. 668,475.

To all whom it may concern:

Be .it known that we, Ramona PIETERS VAN CALoAR, professor, JAN ELLERMAN'N, banker and TIENDRTIEUS JOIIANNES MARTiJN, banker, residing the former in the city of Oegstgeest and the latter two in the city of T he Hague, in the Kingdom of the Netherlands, have invented certain new and useful Improvementsgn Devices for Drying and Sterilizmg Air of which the following is a specification.

It is important in many cases to have in closed rooms completely dry and as far as possible completely sterilized air and to be able to produce this as it is required. By

the known apparatus hithertoused for this purpose the desired object is not attained inasn-iuch as the aqueous vapor and impurities in air are not separated from it at all, or only to a very slight extent. The contrary result is really achieved as by heating the capacity, of air totake up aqueous vapor is merely increased and by ventilation the air saturated withaqueo us vapor is certainly removed but only to be replaced by damp, fresh air. The sterilizing of air in closed rooms has not hitherto been attempted.

. The object of the present invention is to obviate these defects by subjecting the air in closed rooms with means for preventing the ingress of fresh atmospheric air to such treatment in an apparatus mounted iii the closed room itself that the airis freed from all aqueous vapor and impurities and a completely dry and pure air is produced.

The invention consists in the novel features of construction hereinafter described, pointed out in the claims and shown in the accompanying drawings, in which- Figure 1 gives a side view of the appa ratus. Fig. 2 a horizontal section along the line AB in Fig. 3. Fig. 3 a vertical section along the line CD in Fig. 2. Fig.4 a top view of the evaporating pan. Fig. 5 a vertical section along the line E-F in Fig. t. Fig. 6 shows in plan a modified form of the evaporating pan; and Fig. 7 shows in vertical transverse section the modified form of evaporating pan illustrated in Fig. 6 in lan. f l

The damp air enters the apparatus through the openings 1. The air current may if desired be strengthened by means of a Venti-.

lating fan 5 which may or by any other means.

be driven by a motor The current of air passes through and over the pans 2, filled with suitable absorbent material (for example calcium chlorid) in the direction of the arrows (Fig. 3). In this way moisture and impurities are separated from the air, and the dr and sterilized air current passes out from t e appa-ratus.th rough the cover 3 which consists of perforated. sheet-metal. This cover or lid 3 is on itsunderside provided with a wiregauze disk below the ventilating fan so that any particles of calcium chlorid which may be carried along'by the air current strike against this disk and then fallback again into'the pans through the funnel shaped chamber 6. These pans '2 are so arranged in the apparatus that the air current'is compelled to pass through the apparatus in a staggered course whereby the air is brought into contact with the absorp tion medii-xm;(calcium chlorid) 'for as long :a-n extent-as possible. Withthis end in view the pansarearranged opposite to each other .and on. the one side are supported by angle- .irons 8 applied to the-wallwhileoni the opposite side they aresupported by uprights 5) arranged on the next pan below so that on this side they do not quite reach the wall but a passage is left for the air-current which passes by the sideof the pan not composed of wire gauze. The lowest pan is supported on three sides by angle irons 8 secured to the wall:

The pans are provided with sloping per forated or gauze bottoms 7 dished toward the middle and preferably made of wire gauze; so that on the one hand the air passing through the pan by this bottom must penetrate the whole of the absorbing material (calcium chlorid) whereby a very energetic drying and purifying effect is produced and on the other hand the solution of the absorbing material (calcium chlorid) which is formed falls on the pans which lie below. For this purpose an outlet pipe 10 is further provided in the middle of each an. After the solution has in this way left the lowest pan it reaches the chamber 13 below, whence it is led off by the pipe 14 and collected in a suitable receiver 15. This receiver is emptied, when necessary, outside the room in which the apparatus for chlorid is used as the absorbin material it is preferably mixed with so iiim sulfate and copper suifaie before evaporation and after evaporation is sui'tahie for renewed. use. l i hen ealeiuin chlorid is used, ho prevent ii from setting or cahing when the solution is evaporated the bottom of the evaporating pan is preferably constructed in he manner shown in Fig. l, subdivided by partition Walls 12,, or as shown in Fig. 6, provided with points 16 so that a special granulation of the drying material is not necessary,

in order to facilitate a more intensified and rapid suction of the dried and sterilized air the apparatus is narrowed shove the pans, so that here it has the form of two abutting truncated cones and ill the cover a mechanioaily driven exhaust fan is orranged Which still further increases the suotimi.

What We claim is 1. An apparatus for drying; and sterilizing air in closed rooms consisting oi e vessel having at the top the shape of a double funrel and closed at the bottom by asloping floor with an outlet, of pans provided with foraminated bottoms and filled with grar1ulated calcium ehlorid or the like, and of an exhaust fan arranged in the upper part of said vessel, for accelerating the passage of the air, substantially as set forth.

2. An apparatus for drying and sterilizing the air in closed rooms eonsisiing of a oergeee vessel having as the top the shape of a double funnel and closed at the bottom by a sloping door with an (miles, the ieieral Wall of said vessel being provided with pan supporting devises of pans provided with foraminated bottoms, said pans being arranged in such a manner that one pan lies under the other sends with one side "so said "Wall of the vessel and is supported by said devices, an

exhaust fan arranged in the upper part of said vessel, substantially as described.

3. An apparatus for drying and sterilizing the air in closed rooms, comprising a vessel having its upper portion narrowed between iis upper and lower ends and provided with s REINDER METERS VAN CALCAR. JAN ELLERMANN. HENDRIKUS JOHANNES MARTUN. Witnesses:

l. l. HELSDON Rm, EDWARD C. firmer,

flow of the air to be 

